upper-level vs high-ranking

upper-level and high-ranking both are adjectives.

Word	Noun	Adjective	Verb	Adverb
upper-level	No	Yes	No	No
high-ranking	No	Yes	No	No

As adjectives, upper-level and high-ranking are synonyms defined as:

upper-level and high-ranking: at an elevated level in rank or importance

Other synonyms of upper-level include high-level.

upper-level (adjective)	high-ranking (adjective)
at an elevated level in rank or importance	at an elevated level in rank or importance